Data adaptive mixing automatic retransmitting method for orthogonal frequency division multisystem
A technology of hybrid automatic retransmission and orthogonal frequency division, which is applied in multi-frequency code systems and uses return channels for error prevention/detection, etc., can solve problems such as inability to obtain frequency diversity gain, increase decoding reliability, reduce Bit error rate and transmission delay, the effect of transmission performance optimization
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[0030] The data self-adaptive hybrid automatic retransmission method for the OFDM system proposed by the present invention first reads the information bits from the user data source, and performs cyclic redundancy check coding; Coding and modulation to form K modulation symbols, and store data according to the retransmission indication information of the receiving end; perform symbol reorganization on the above stored data according to the output channel parameters at time t-1 in the system; perform inverse Fourier transform on the above recombination, Get the time domain signal of the stored data, add a cyclic prefix to it and send it; receive the above data, remove the cyclic prefix, and perform Fourier transform to obtain the received data symbol in the frequency domain; output the channel according to the t-1 time of the system Parameters, performing adaptive deinterleaving corresponding to the symbol recombination at the sending end on the above-mentioned received data sig...
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